T1/E1 Trunk and Digital Voice Port Pinouts (RJ-45)

Table: T1 or E1 Port Pinouts (RJ-45)

Shutdown Port

If the port is not operational, check to make sure the port is not shut down. Enter the show voice port command with the voice port number that you are troubleshooting, which tells you:

If the voice port is up. If it is not, use the no shutdown command to make it active.

What parameter values have been set for the voice port, including default values. (these do not appear in the output from the 'show running-config' command.) If these values do not match those of the telephony connection you are making, reconfigure the voice port.